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How does diet influence the reproductive seasonality of tropical freshwater fish?: A case study of a characin in a tropical mountain river Neotropical Ichthyology
Ballesteros,Tania M.; Torres-Mejia,Mauricio; Ramírez-Pinilla,Martha P..
Seasonal breeding of tropical freshwater fish may be synchronized with periods of high food consumption. We explored this hypothesis by studying the relationship between diet and reproductive activity of Creagrutus guanes (Teleostei, Characidae). Our results showed that C. guanes had a generalist and omnivorous diet dominated by aquatic insects (mainly Diptera larvae) and seeds. Creagrutus guanes did not show intersexual or ontogenetic variation in diet. Peaks of feeding activity during rainy months were not synchronized with breeding in dry months. Our results do not support the hypothesis that the reproductive season has to be synchronized with high food consumption. We discussed the hypothesis fat reserves may be an important factor for the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Feeding ecology; Phenology; Characidae; Fat reserves; Breeding; Creagrutus guanes.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000400019
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